Abstract: A marine pile driving and boring apparatus is disclosed. An illustrative embodiment of the apparatus includes a barge having an elongated hammer slot, a boom track carried by the barge generally adjacent to said hammer slot, a boom platform carried by the boom track, a boom tower carried by the boom platform and a hammer assembly having a hammer carried by the boom tower.

Abstract: A knee brace for preventing lateral displacement of the patella, made of an elasticized sleeve worn over the leg and spanning the knee. The sleeve carries a pair of pads, one of which lies immediately adjacent the outer edge of the patella and blocks the patella from lateral displacement. The second pad overlies the medial femoral epicondyl to prevent the sleeve from rotating outwardly as forces are applied against the first pad by the patella. The pads are locked in place by an elastic strap secured to the sleeve and running laterally to medially over the knee.